A mathematical model has been established for fluid flow and heat transfer in weld pool with a deformed surface.
建立了熔池表面存在变形的流场与热场的数学模型。
The calculated results of current density and heat flux on flat weld pool surface using model established in this paper are agreed with experiment.
用本模型计算出的平坦熔池表面电流密度和热流密度的分布与试验结果显示了很好的一致性。
Finally, the fluid flow of the weld pool was taken into account by increasing the heat conduction coefficient at elevated temperature.
最后采用增大热传导系数的方法，考虑了熔池内流体流动对整个温度场的影响。
Weld spatter consists of particles of metal unintentionally ejected from the molten pool during welding and deposited on the surface of base or weld metal.
焊接溅落包括无意地从熔融池中溅出的金属颗粒并落到了母体金属或焊缝金属的表面。
The foundation of the future research of weld pool image processing and weld bead control was established.
为进一步进行熔池图像处理和焊缝成型控制的研究奠定了基础。
The present research mainly focuses on detecting the processing stability, assembly quality, defocusing, weld penetration, weld shape, pool and keyhole, etc.
目前实时检测的内容主要有焊接过程的稳定性、装配质量、离焦量、焊缝熔深和表面形貌、熔池与小孔的形态等。
A fast algorithm of image processing was designed for extracting the shape parameters of the weld pool in real time.
设计了快速图像处理算法，满足在实际焊接过程中提取熔池形状参数的要求。
An approach is proposed that this deviation can be obtained by using the weld pool image centroid and a Kalman filter.
为此提出一种利用熔池图像质心和卡尔曼滤波来间接获取电弧与焊缝偏差的方法。
The results of the simulation show that the shape of the weld pool is typically oval.
计算结果表明：钛合金电子束焊接时，熔池呈典型的卵形分布。
The main feature of the device is able to observe arc and molten pool directly in coaxial direction so that the welding process is easily controlled and alignment of weld can be warranted.
其装置特点是能够轴向直接观察电弧和熔池状态，从而便于控制焊接过程，保证焊缝的对中性。
This paper studied the effects of weld pool surface deformation on welding arc behavior characters basing on unified arc pool mathematical model.
在电弧与熔池统一模型的基础上研究熔池上表面变形对电弧行为特征的影响。
Through analysis on inside weld forming and welding procedure of SSAW pipe, it pointed out weld crack is easy to appear in brittle temperature zone in welding pool.
通过对螺旋埋弧焊管内焊缝成型和焊接过程的分析，指出焊缝裂纹易产生在焊接熔池脆性温度区。
With the captured images of the weld pool, the shape parameters of the weld pool can be calculated using image processing algorithm, for fulfill the requirement of real time control.
利用获得的焊接熔池图像，采用一定的熔池图像处理算法可以计算出熔池形状的特征参数，以满足过程建模和实时控制的要求。
The qualitative analysis is carried out on the behavior of the partial penetrated weld pool with welding current changing from pulsed peak value to base value during pulsed TIG welding.
对脉冲TIG焊未熔透型熔池在脉冲峰-基转换期间熔池三维形态变化行为进行了定性的分析，并从力和能量角度建立了未熔透熔池液面形态的数学模型。
The TIG welding pool calculator image detecting system can effectually detect the breadth of weld seam by contrasting the data of detecting with the data of experiment.
通过与熔池图像对应的实际焊缝宽度对比，该TIG焊熔池计算机图像检测系统能够比较好的检测到焊缝宽度信息。
The passive visual sensing method was successfully applied to detect the image of weld pool in CO2 welding.
应用被动式视觉传感方法进行CO2焊焊接熔池的形状检测。
TIG welding experiments show that the predictions of the model have a good agreement with the experimental observation with respect to weld pool shape.
焊接工艺试验表明，根据该模型计算的焊缝成形与试验测试结果吻合程度良好。
Based on these fuzzy control forms, weld pool width is easily controlled by adjusting welding current.
以焊接电流为控制量，可以根据此控制作用表对焊缝熔宽进行实时控制。
The results showed that: the welding current and surface tension temperature coefficient has a critical influence on the internal flow of weld pool and determines the shape of TIG welding pool.
结果表明，焊接电流和表面张力温度系数对熔池内部流动有着至关重要的影响，决定了TIG熔池的截面形貌。
The surface tension, arc blow force and electromagnetic force work positive to improve the penetration, and the buoyancy can increase the width in the middle of weld pool.
表面张力、电弧吹力和电磁搅拌力均有利于获得较大的熔深，浮力有利于增加焊缝中间部位的宽度。
Passive visual sensing method is the major method for sensing welding process, the principle of which is to capture weld pool image by the illumination of electric arc.
被动式视觉传感方法是焊接过程传感的一种主要方法，其主要原理是利用电弧光照射熔池表面获得熔池图像。
A three-dimensional numerical analysis model of fluid flow and heat transfer in pulsed current TIG weld pool is developed.
对运动电弧作用下脉冲tIG焊接熔池流场与热场动态变化过程建立了三维数学模型。
The investigation of the relationships between weld pool shape parameters and welding process parameters may be beneficial to the quality control of CO2 welding.
在大量工艺实验的基础上，本文进一步研究了熔地形状参数与焊接规范参数之间的关系，从而为CO_2焊接质量控制奠定了基础。
The investigation of the relationships between weld pool shape parameters and welding process parameters may be beneficial to the quality control of CO2 welding.
在大量工艺实验的基础上，本文进一步研究了熔地形状参数与焊接规范参数之间的关系，从而为CO_2焊接质量控制奠定了基础。
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